Fix hw layer overdraw/update visualization

Fixes: 28748255

Change-Id: I83b531cdf5e4407fd17edd72d96e6189924926fa
diff --git a/libs/hwui/BakedOpRenderer.cpp b/libs/hwui/BakedOpRenderer.cpp
index 3c302b3..eed0126 100644
--- a/libs/hwui/BakedOpRenderer.cpp
+++ b/libs/hwui/BakedOpRenderer.cpp
@@ -55,6 +55,7 @@
     }
 
     mRenderTarget.offscreenBuffer = offscreenBuffer;
+    mRenderTarget.offscreenBuffer->hasRenderedSinceRepaint = false;
 
     // create and bind framebuffer
     mRenderTarget.frameBufferId = mRenderState.createFramebuffer();